My main research areas lie in the calculus of variations, nonlinear partial differential equations, infinite-dimensional dynamical systems and their applications to nonlinear mechanics. In solid mechanics, I am especially interested in the mathematics of microstructure arising from phase transformations in solids, using models based on nonlinear elasticity, where the problem of predicting microstructure morphology is related to deep unsolved questions of the multi-dimensional calculus of variations such as understanding quasiconvexity. Another main interest is in the mathematics of liquid crystals, in particular concerning how defects can be studied using different models. Recently I have also become interested in problems of computer vision.
Prof Sir John Ball FRS FRSE
I took my undergraduate degree in Mathematics at Cambridge before obtaining my DPhil in 1972 at the University of Sussex. Prior to starting at Queen’s in 1996 I was Professor of Applied Analysis at Heriot-Watt University in Edinburgh, where in 2018 I returned as Professor of Mathematics. I have held visiting professorships at the University of California at Berkeley, at the Université Pierre at Marie Curie, Paris, at the Tata Institute of Fundamental Research, Bangalore, at the Institute for Advanced Study, Princeton, and at the University of Montpellier II. I am a former President of the International Mathematical Union and member of the Executive Board of the International Council for Science.